package com.hmdp.utils;

import com.hmdp.dto.UserDTO;


import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


public class LoginInterceptor implements HandlerInterceptor {


    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //移除用户
        UserHolder.removeUser();
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断是否需要拦截(ThreadLocal中是否有用户,有就放行,无就拦截)
        UserDTO user = UserHolder.getUser();
        if (user == null) {
            response.setStatus(401);
            return false;
        }
        //放行
        return true;
        }
}
